Season-to-date snowfall at official NWS climate stations compared with the climatological normal (Jul 1–Jun 30). Not ski-area or mountain COOP totals.
| City | STD in | Normal | Departure | % of normal |
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First day with ≥0.1 in of snow at the same official climate stations (Jul 1–Jun 30). TRACE does not count. Typical / earliest / latest come from the IEM daily snow archive at each site (≥10 completed seasons; per-city years in the History column). Not Storm Events.
| City | Status | First snow | Typical | Earliest | Latest | Vs typical | History | Amount |
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First fall freeze is the first date on or after Aug 1 with an official NWS climate-station minimum of 32°F or lower. Airport and city stations often freeze later than nearby suburbs and farms.
Same 11 CLI climate hubs as first snow. Live season = NWS CLI daily minimum (via IEM) — not IEM daily.py METAR mins, not PNS/LSR. Completed local days only (through yesterday). Headline threshold 32°F; also frost possible (≤36°F) and hard freeze (≤28°F). Normal dates = NCEI 1991–2020 50% probability; history columns = IEM daily (METAR-derived, may run warm vs CLI; labeled separately).
| City | Status | First freeze | NCEI normal | Vs normal | Frost possible | Hard freeze | Growing season | IEM typical | IEM earliest | IEM latest | IEM history |
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Season-to-date heating degree days at the same 11 official NWS climate stations (Jul 1–Jun 30), base 65°F. Daily HDD is computed from the CLI high and low (mean = floor((high+low)/2 + 0.5); HDD = max(0, 65 − mean)).
Normals = NCEI 1991–2020 HTDD (matched days; Feb 29 only in leap years). % of normal only when normal-to-date ≥ 100 HDD and the station is complete. Compared vs NCEI 1991–2020 normal. Airport/urban CLI sites; HDD is a temperature index, not a measure of energy use or bills. Gaps in CLI (missing/M or intraday provisionals) are tagged ACIS backfills when available.
| City | STD HDD | Normal | Departure | % of normal | Last season (same date) | Last season (full) | ANN normal | Checked through |
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